I've had a problem with bogging in my 90 Sub with 350 tbi and 770r4 w/ 7747 ecm. Not sure if I posted about it here before. Basically have a intermittent low rpm bog. Have been chasing my tail trying to find the problem. Today I decided to play with the tune some and tried pulling out the warm spark bias which was at 9.XX. All the other bins I have downloaded suggest that this is the correct number to have. However, when I pulled it out, my bog disappeared almost completely. Had it do it a tiny bit, but nothing like before. What is the reason for the warm bias? I understand the cold bias, but I would think if there was a subtraction in spark wanted when warm it would be easier to just set the main table correctly. What's the reasoning behind having the warm bias this way?